Once, while I was in college, a professor said, "The more you learn about a subject, the less defined it becomes."
"Whaaaat?" I thought. "That can't be true. The more you know about something the more you should be an expert on it. The more you should be able to pin it down. Expert knowledge leads to a point, a finite amount of information and precise definition," my mind screamed.
Well, now I think he was right.
The end result of study and search into any field, the more fuzzy it becomes. It doesn't result in a point; it results in a fan. The more variations you discover and the more interlocking happens with other areas of study.
So, it's almost like the more you know, the less you really know. Like going from a tunnel to a hall, then a small room, larger rooms to an dense jungle to a forest to a plain to a beach to an ocean to the air.
I hope when I die, I will finally know everything.
If you're interested in the many different ways thinking happens, http://www.thinking.net/ might be a good jumping off place. I know I plan to mine this site for a while.